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reflecting radio waves makes radio communication possible
absorbing U-V radiations
absorbing cosmic ray particles
regulating the temperature of atmosphere
Ozone saves the biosphere by absorbing high energy radiations called _.
Paleontology is a branch of science that deals with the
Paper is manufactured by
Paper of old books turns to brownish color due to
Paraffin wax used for making candles is obtained from
Particulates (< 1 µm size) remaining suspended in air indefinitely transported by wind currents are called
Pasteurisation is the process in which milk is heated to
Patients with sickle cell anemia are homozygous for
Pedology is the study of
People die in an atmosphere of carbon dioxide because